部分中文转换为多语言代号

pkg/langs/lang.go

@@ -2,6 +2,16 @@
 
 package langs
 
+import (
+	"errors"
+	"github.com/TeaOSLab/EdgeCommon/pkg/configutils"
+	"strings"
+)
+
+const varPrefix = "lang."
+
+type LangCode = string
+
 type Lang struct {
 	code string
 
@@ -30,3 +40,39 @@ func (this *Lang) Get(messageCode string) string {
 func (this *Lang) GetAll() map[string]string {
 	return this.messageMap
 }
+
+// Compile variable to literal strings
+func (this *Lang) Compile() error {
+	for code, oldMessage := range this.messageMap {
+		message, err := this.get(code, 0)
+		if err != nil {
+			return errors.New("compile '" + code + "': '" + oldMessage + "' failed: " + err.Error())
+		}
+		this.messageMap[code] = message
+	}
+	return nil
+}
+
+func (this *Lang) get(messageCode string, loopIndex int) (string, error) {
+	if loopIndex >= 8 /** max recurse **/ {
+		return "", errors.New("too many recurse")
+	}
+	loopIndex++
+
+	message, ok := this.messageMap[messageCode]
+	if len(message) == 0 {
+		if !ok && loopIndex > 1 {
+			// recover as variable
+			return "${" + varPrefix + messageCode + "}", errors.New("can not find message for code '" + messageCode + "'")
+		}
+		return "", nil
+	}
+
+	return configutils.ParseVariablesError(message, func(varName string) (value string, err error) {
+		if !strings.HasPrefix(varName, varPrefix) {
+			return "${" + varName + "}", nil
+		}
+
+		return this.get(varName[len(varPrefix):], loopIndex)
+	})
+}